Compositions – Miscellaneous
Reexamination Certificate
2005-03-08
2005-03-08
Toomer, Cephia D. (Department: 1714)
Compositions
Miscellaneous
C106S638000, C106S713000, C106S725000, C106S739000
Reexamination Certificate
active
06863837
ABSTRACT:
The present invention provides a sulfonated coal tar distillate salt polymer that is a condensation product of an aldehyde, preferably formaldehyde, and a sulfonated middle fraction obtained during coal tar distillation. The middle fraction includes from about 40% to about 95% by weight naphthalene and from about 5% to about 60% by weight of a plurality of compounds selected from the group consisting of quinoline, indene, biphenyl, indane, acenaphthene, anthracene, phenanthrene, methyl naphthalene, cresol, phenol, xylenol, and tetralin. The present invention also provides a method of forming a sulfonated coal tar distillate salt polymer. The method includes sulfonating the middle fraction to form a middle fraction sulfonic acid mass, optionally adding a first portion of water to the middle fraction sulfonic acid mass to form a mixture, reacting the mixture and an aldehyde to form a condensate, optionally adding a second portion of water to dilute the condensate, and adding a base to form a sulfonated middle fraction salt polymer. Sulfonated middle fraction salt polymers formed in accordance with the method of the invention are useful as dispersants and plasticizers in aqueous cementitious slurries.
REFERENCES:
patent: 2121845 (1938-06-01), Wernicke
patent: 2141569 (1938-12-01), Tucker
patent: 2227999 (1941-01-01), Brandt et al.
patent: 2529602 (1950-11-01), Frohmader
patent: 3067243 (1962-12-01), Richter
patent: 3193575 (1965-07-01), Nebel et al.
patent: 3277162 (1966-10-01), Johnson
patent: 3954677 (1976-05-01), Law
patent: 4290973 (1981-09-01), Aude et al.
patent: 4604404 (1986-08-01), Munson et al.
patent: 5179170 (1993-01-01), Ohtsu et al.
patent: 5534166 (1996-07-01), Brueckmann et al.
patent: 6027561 (2000-02-01), Gruber et al.
patent: 04476256 (1989-07-01), None
patent: 03199149 (1991-08-01), None
Elko Dawn P.
Heller, Jr. David B.
McMahon Michelle L.
Savoly Arpad
Veal Bennie
GEO Specialty Chemicals, Inc.
Rankin, Hill Porter & Clark LLP
Toomer Cephia D.
LandOfFree
Dispersant composition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dispersant composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispersant composition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3405290